What does $(A\mid b)$ denote in Linear Algebra? Specifically in the context of the following question:
"If $(A\mid b)$ is in reduced row echelon form, prove that A is also in reduced row echelon form."
What does $(A\mid b)$ denote in Linear Algebra? Specifically in the context of the following question:
"If $(A\mid b)$ is in reduced row echelon form, prove that A is also in reduced row echelon form."
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